According to information found at the Center for Ray Bradbury Studies, from an unnamed but very reliable source, the four specific Twilight Zone episodes in question are:

Walking DistanceThe LonelyWhere is Everybody? (the TZ pilot, but not mentioned until after these two)Nothing in the Dark (not written by Serling)

There have been long discussions regarding "Walking Distance."

As for "The Lonely," a person would just have to look at all of Bradbury's isolated individual on Mars, and human-like robot stories, and make up their own mind. There is one, I think, in "The Martian Chronicles," where a man's family all dies, he replaces them with robots, then forgets they are robots and not his original family. (By the way, Lester Del Ray wrote a story, "Helen O'Loy," which is more similar to the Bradbury story than is "The Lonely," so Bradbury was by no means the only one to write such a story, which, of course, goes back to ancient Greece with Pygmalion.) There is also at least one in "The Illustrated Man" about an isolated section of Mars being used as a penal colony. Someone may have seen or inferred some resemblance between these and "The Lonely."

"Where is Everybody?" Bradbury considered to be like his story in "The Martian Chronicles," "The Silent Towns." (NOT "Here There Be Tygers.") Read the story and watch the episode; they are quite different with surface similarities and entirely different outcomes and points.

As for "Nothing in the Dark," the story "Death and the Maiden" can be found in Bradbury's collection "The Machineries of Joy." Many of his works are available for preview on Amazon.com, but alas, it seems, not this one, so I can't find a copy to which to direct you online. What's more, I'd have to reserve full judgment until I'd actually seen the episode! Yes, four years later--almost to the day--I have STILL not seen "Nothing in the Dark," but I noticed a remarkable resemblance to two Bradbury stories, "There Was an Old Woman," and, particularly "Death and the Maiden," just from the clips on the PBS "American Masters" program on Serling. If I didn't mention it before, and I don't seem to have, the phrase "There's nothing in the dark that wasn't there when the light was on" is used in one of my alltime favorite movies, "The Boy with Green Hair" from 1948.

Originally posted by dandelion:If I didn't mention it before, and I don't seem to have, the phrase "There's nothing in the dark that wasn't there when the light was on" is used in one of my alltime favorite movies, "The Boy with Green Hair" from 1948.

That's the actual title of the original (very) short story GCJ wrote which was adapted into Nothing in the Dark. The adaptation was vastly different from the short story.

Originally posted by philnic:There were two, actually. I have detail on the other one (Burning Man) on my website, here.

I've said before, and I'll say again, that The Burning Man is the finest adaptation of any Bradbury story for television.

You know how some folks complain that coffee doesn't taste like it smells? Well, here is one episode that actually tastes like the original story. This is Bradbury done right. They truly ripped the pages out of the book and stuffed them into the camera!

dandelion, I have that "original stories" book, and had assumed that it contained ALL the original stories, but obviously not. Maybe it only contains PREVIOUSLY PUBLISHED stories...but that doesn't work either, because "I Sing the Body Electric" was published as a story 7 years after it was filmed as a TZ script.

Originally posted by Doug Spaulding:...the original (very) short story GCJ wrote which was adapted into Nothing in the Dark...

Doug, is that (very) short story published anywhere? I'd like to read it.

Malcom at Mystery & Imagination bookstore (where we are holding our booksiging next month)has copies signed by George for just $21.99.

George has publicly acknownledged that he realized after he wrote it and they ran it as a TZ how much he had been influenced by Ray's "Death and the Maiden". He apologized to Ray who was fine with it and said they were different (which they are for sure). George alos idolized Bradbury as did some of the other members of "The Group" which he seemed more tolerant of than Serling. Maybe a bit of jealosy on Ray's part due to Serling's success with a series that Ray had wanted to do for years.

Tonight I saw this fine adaptation of two episodes of The Twilight Zone live on stage. The Bradbury connection? "Will the Real Martian Please Stand Up?" featured that famous line spoken by character Avery when they think that a Martian might be in their midst, "It's a regular Ray Bradbury!" And the actor playing Avery? None other than Ray's own Phil Sokoloff! And the director of "Mr Garrity and the Graves"? Mr Charlie Mount himself, the same fellow who produced Falling Upward!. Isn't is a small world?

Not strictly Twilight Zone, but Ray's short story "And So Died Riabouchinska" was masterfully done as an episode of "Alfred Hitchcock Presents," featuring the phenomenal Claude Rains. Watch it here:https://www.dailymotion.com/video/x52vp9j